Snape snorted at the remark about sleep. "The owls are barely astir." he replied with remarkable mildness, for him.
He arched a skeptical eyebrow at James' claim to give a damn about how Snape was doing, but James' next comment sent the other eyebrow soaring to join it in his hairline. "Let me get this straight," he replied dubiously. "You're actually want me to attend. A social gathering. Not just any social gathering but your wedding reception." All of the above delivered in a 'who are you and what have you done with James Potter' tone of voice.